VIEW THE MOBILE VERSION of www.steelmaking.ca Informational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Heating
Although it is possible to work steels cold, to an extent de...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Conclusions
Martien was probably never a serious contender for the honor ...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...



An Automatic Temperature Control Pyrometer






Category: PYROMETRY AND PYROMETERS

Automatic temperature control instruments are similar to the Brown
indicating high resistance pyrometer with the exception that the
pointer is depressed at intervals of every 10 sec. upon contact-making
devices. No current passes through the pointer which simply depresses
the upper contact device tipped with platinum, which in turn comes
in contact with the lower contact device, platinum-tipped, and the
circuit is completed through these two contacts. The current is very
small, about 1/10 amp., as it is only necessary to operate the relay
which in turn operates the switch or valve. A small motor is used to
depress the pointer at regular intervals. The contact-making device
is adjustable throughout the scale range of the instrument, and an
index pointer indicates the point on the instrument at which the
temperature is being controlled. The space between the two contacts
on the high and low side, separated by insulating material, is
equivalent to 1 per cent of the scale range. A control of temperature
is therefore possible within 1 per cent of the total scale range.
Figure 131 shows this attached to a small furnace.





Next: Pyrometers For Molten Metal

Previous: Brown Automatic Signaling Pyrometer



Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network
Report
Privacy
SHAREADD TO EBOOK


Viewed 4251